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  • OSHA’s Silica in Construction Standard

    Concerns for Fire Sprinkler Installers On March 25, 2016, the Occupational Safety and Health Administration (OSHA) published its final rule on respira…

  • Understanding the Darcy-Weisbach Equation

    When Not to Use Hazen-Williams Any seasoned fire sprinkler designer or fire protection engineer should be familiar with the Hazen-Williams equation. I…

  • Hydraulic Calculations

    Back to Basics Hydraulic calculations completed by hand are a thing of the past. Computer programs can provide you with pages of information at the cl…

  • Longitudinal Sway Bracing of CPVC

    Using an NFPA 13 Analogy There are very few listed sway brace fittings for CPVC pipe. Listing criteria specified by the CPVC resin manufacturers and r…

  • Omitting Flow From Sprinklers in the Design Area

    Identifying Acceptable Small Compartments One of the key aspects of designing a sprinkler system is making sure that the water supply can handle all o…

Understanding the Darcy-Weisbach Equation

When Not to Use Hazen-Williams Any seasoned fire sprinkler designer or fire protection engineer should be familiar with the Hazen-Williams equation. It is the fundamental equation used in water-based fire protection for calculating the friction loss of water flowing through pipe. The Hazen-Williams formula (see Figure 1) is used when …

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Hydraulic Calculations

Back to Basics Hydraulic calculations completed by hand are a thing of the past. Computer programs can provide you with pages of information at the click of a mouse. However, given the demand for new sprinkler designers, there is a need to return to the basics. Designers, particularly newer designers, …

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Longitudinal Sway Bracing of CPVC

Using an NFPA 13 Analogy There are very few listed sway brace fittings for CPVC pipe. Listing criteria specified by the CPVC resin manufacturers and recognized by Underwriters Laboratories (UL) define the mechanics required of listed CPVC sway brace fittings and their design. Accordingly, UL listing requires strictly defined features …

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Listed Spray Sprinklers

Temperature Change

What Else the Testing Tells Us A common part of our industry is the use of Listed components. Other than the general understanding that this requirement provides a level of confidence that the devices will work, we typically don’t give the subject a lot of thought. There are multiple aspects …

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Identifying Microbes

What is Contaminating My Fire Sprinkler System? While microorganisms do not produce unique types of corrosion, they can accelerate corrosion reactions. Microbial action has been identified as a contributor to rapid corrosion of metals and alloys exposed to soils; seawater, distilled water, and freshwater; crude oil, hydrocarbon fuels, and process …

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Bolted Steel Tanks

Bolted Steel Tanks

The Right Fit for Fire Protection Over the last 100 years, the methods to store water for fire protection have evolved and become more sophisticated, resulting in superior fire suppression. Modern tanks that store water used for fire protection are very specific and are governed by NFPA 22, Standard for …

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